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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/143299
Tunable self-healing of magnetically propelling colloidal carpets
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The process of crystallization is difficult to observe for transported, out-of-equilibrium sys-tems, as the continuous energy injection increases activity and competes with ordering. Inemergingfields such as microfluidics and active matter, the formation of long-range order isoften frustrated by the presence of hydrodynamics. Here we show that a population ofcolloidal rollers assembled by magneticfields into large-scale propelling carpets can formperfect crystalline materials upon suitable balance between magnetism and hydrodynamics.We demonstrate afield-tunable annealing protocol based on a controlled colloidalflow abovethe carpet that enables complete crystallization after a few seconds of propulsion. Thestructural transition from a disordered to a crystalline carpet phase is captured via spatial andtemporal correlation functions. Ourfindings unveil a novel pathway to magnetically annealclusters of propelling particles, bridging driven systems with crystallization and freezing inmaterial science.
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MASSANA-CID, Helena, MENG, Fanlong, MATSUNAGA, Daiki, GOLESTANIAN, Ramin, TIERNO, Pietro. Tunable self-healing of magnetically propelling colloidal carpets. _Nature Communications_. 2019. Vol. 10, núm. 1, pàgs. 2444. [consulta: 21 de gener de 2026]. ISSN: 2041-1723. [Disponible a: https://hdl.handle.net/2445/143299]